diff --git a/ieee.csl b/ieee.csl
index 5b99f256d3..d600a74e74 100644
--- a/ieee.csl
+++ b/ieee.csl
@@ -363,7 +363,7 @@
           <text macro="access"/>
         </else-if>
         <else-if type="chapter">
-          <group delimiter=", " suffix=". ">
+          <group delimiter=", " suffix=".">
             <text macro="title"/>
             <group delimiter=" ">
               <text term="in" suffix=" "/>